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[PATCH] Fix PR67278, x86 target part


The following fix from Uros properly (not) handles XFmode vectors in
type_natural_mode.

Bootstrapped and tested on x86_64-unknown-linux-gnu by Uros, applied.

Richard.

2016-03-02  Richard Biener  <rguenther@suse.de>
	Uros Bizjak  <ubizjak@gmail.com>

	PR target/67278
	* config/i386/i386.c (type_natural_mode): Handle XFmode vectors.

	* gcc.dg/simd-8.c: New testcase.

Index: gcc/config/i386/i386.c
===================================================================
--- gcc/config/i386/i386.c	(revision 233897)
+++ gcc/config/i386/i386.c	(working copy)
@@ -7794,6 +7794,10 @@ type_natural_mode (const_tree type, cons
 	{
 	  machine_mode innermode = TYPE_MODE (TREE_TYPE (type));
 
+	  /* There are no XFmode vector modes.  */
+	  if (innermode = XFmode)
+	    return mode;
+
 	  if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
 	    mode = MIN_MODE_VECTOR_FLOAT;
 	  else
Index: gcc/testsuite/gcc.dg/simd-8.c
===================================================================
--- gcc/testsuite/gcc.dg/simd-8.c	(revision 0)
+++ gcc/testsuite/gcc.dg/simd-8.c	(working copy)
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+
+#if __SIZEOF_LONG_DOUBLE__ == 16 || __SIZEOF_LONG_DOUBLE__ == 8
+typedef long double a __attribute__((vector_size (32)));
+
+a __attribute__((noinline))
+sum (a first, a second)
+{
+    return first + second;
+}
+
+a
+foo (a x, a y, a z)
+{
+  return sum (x, y) + z;
+}
+#else
+int main() {}
+#endif


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